Across
Yogi breaks cane when spanked – it’s deviancy (9)
I haven't cracked this one yet — but Fifteensquared have:
(Yogi) BERRA breaks *(cane) [anag: when spanked ] Yogi Berra was a famous baseball player and coach.
Backstreet in Paris? Within it, the French and Swiss whizz (5)
I haven't cracked this one yet — but Fifteensquared have:
LE ("the" in "French") within <=RUE ("street in Paris", back) Leonhard Euler was an 19th century Swiss mathematician.
Game to don legwear this person’s possibly returned for a fee (7)
Basic textbooks right to be adopted by 3, 5 and 13? (7)
Relation of audiobook version of Zola novel? (5)
Refused or declined to smuggle dope from the east (9)
I haven't cracked this one yet — but Fifteensquared have:
ABATED ("declined") to smuggle <=GEN ("dope", from the east , i.e. from right to left)
Clumsily lost Ed Sheeran CD, showing no emotion (4-11)
London venue millennial’s outside, with Dua Lipa playing (9)
Pick up £1,000 tip (5)
This prevents experiments with Spooner’s ideal complexion (4,3)
Singer of a lot of rock, as well as Gershwin (7)
Maybe Guardian compiler welcomed by Lady Gaga (5)
I haven't cracked this one yet — but Fifteensquared have:
I ("compiler") welcomed by *(lady) [anag: gaga ]
Injured hip? Need package of rare drug (9)
Down
In the main, one may use this item, roughly cutting bread (7,3)
I haven't cracked this one yet — but Fifteensquared have:
THING ("item") + Ca. (circa, so "roughly") cutting BAP ("bread" roll)
Friend, without hesitation, getting Boy’s Own (8)
I haven't cracked this one yet — but Fifteensquared have:
PAL ("friend") without (i.e. outside) ER ("hesitation") getting SON ("boy")
21d
Singer of song inspiring an incredible energy (6,6)
What’s inhaled by queen – king’s rolling a joint (4)
Observer getting excited, tweeting French word that comes up (7,3)
I haven't cracked this one yet — but Fifteensquared have:
PEEPING ("tweeting") + <=MOT ("French" for "word", coming up )
Get ticked off like a barrister or a judge? (8)
Harry Styles, foxier than everyone else (6)
Flipping painful love for Oedipus (4)
I haven't cracked this one yet — but Fifteensquared have:
[ flipping ] <=SORE ("love") Eros was the Greek God of love, and Oedipus was a character in a Greek play, so Eros would have been his god of love.
Worked out base 3 in Asian location (7,3)
Uninterested in big news for the Spencers in 1981 (10)
I haven't cracked this one yet — but Fifteensquared have:
When she became betrothed to the future King Charles in 1981, Diana Spencer's family may well have informed people by saying " DI'S ENGAGED "
Rash son holds former pupil up, and senior ones (4,4)
I haven't cracked this one yet — but Fifteensquared have:
HEADY ("rash") + S (son) holding <=OB (old boy, so "former pupil", up )
Shunning company using computers, I see, after trifling returns (8)
I haven't cracked this one yet — but Fifteensquared have:
IT (information technology, so "computers") + I + C (see) after <=MERE ("trifling", returns )
Female’s left reeling as life’s a bitch in Hollywood (6)
See 3
Barber’s poignant adagio band played finally (4)
I haven't cracked this one yet — but Fifteensquared have:
(poignan) T (adagi) O (ban) D (playe) D [ finally ] Refers to Sweeney Todd, the Demon Barber of Fleet Street.
Note banks periodically loth to give a bit of capital (4)
I haven't cracked this one yet — but Fifteensquared have:
SO ("note") banks [ periodically ] (l) O (t) H
Type letters or click words in the clue